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Monte Carlo-based straightness measurement method under minimum entity requirement

A technology of straightness and straightness error, which is applied in the fields of precision measurement and computer application, and achieves the effect of stable method, easy popularization and fast calculation speed.

Inactive Publication Date: 2021-10-08
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, there is still a lack of a fast and stable way to mark straightness tolerances. Applying LMR to the best measurement point reasoning method for cylindrical parts detection

Method used

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  • Monte Carlo-based straightness measurement method under minimum entity requirement
  • Monte Carlo-based straightness measurement method under minimum entity requirement
  • Monte Carlo-based straightness measurement method under minimum entity requirement

Examples

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Embodiment Construction

[0033] The following are specific examples of the present invention, which are further described with the scheme of the present invention, but the present invention is not limited to these examples.

[0034] Step 1: According to this specific cutting method, the part material is 45 steel, the length L is 57mm, and the tool material is YT15. The dimensional error of the part during turning is predicted, and the calculation is obtained u mx =0.0011mm, u my =0.3288mm, u wx =0.00037mm, u wy =0.1284mm, d p =0.1 mm, put it into the formula to get a typical machining error model is banana shape, the relationship between the part length of a certain busbar and the dimensional error, the maximum dimensional error is 0.0618mm, which meets the dimensional tolerance requirements, and some data are shown in the table below ;

[0035]

[0036] Go to step 2 after step 1 is completed.

[0037] Step 2: Detect the part assuming that the section has N =48 measuring points, the numb...

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Abstract

The invention belongs to the field of precision measurement and computer application, and relates to an optimal measurement point number reasoning method for rapidly and stably marking linearity tolerance application minimum entity requirement (LMR) during cylinder part detection, which is realized by the following steps of: 1, obtaining a size error morphology change function under a specific processing condition; 2, setting N (N is greater than or equal to 3) measuring points on the cross section of the cylinder part, wherein a total of I cross sections exits, and analyzing the size error compensation application LMR straightness tolerance to obtain a shape change function of an actual part; 3, obtaining a simulation function of the measuring point according to the morphology change function of the part; 4, carrying out LMR straightness error evaluation to obtain the variable quantity of the average value of the limit equivalent dimensions; 5, if the variation is smaller than 0.001 mm, executing the step 6, otherwise, returning to the step 2; and 6, when the measurement error is less than or equal to the measurement allowance, outputting the number of the finally obtained measurement sections and the number of measurement points, otherwise, increasing the number of the sections and returning to the step 2.

Description

technical field [0001] The invention belongs to the field of precision measurement and computer application, and relates to a method for quickly and stably labeling the best measurement point number reasoning method for the detection of cylinder parts with straightness tolerance in a given arbitrary direction and applying the minimum physical requirement (LMR), which can be used for three-coordinate measurement Measure the straightness error of parts in Coordinate Meas-uring Machine (CMM) equipment, and provide guidance for the improvement of parts processing and processing technology. Background technique [0002] Straightness is a relatively common parameter in geometric tolerance inspection, and it is more common to have two specific tolerance types in a given plane and in a given arbitrary direction. In the information and digital manufacturing environment, in order to control the straightness error of mechanical products, digital precision measurement equipment such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/22G01B21/04
CPCG01B21/22G01B21/045
Inventor 黄美发苟国秋梁健伟
Owner GUILIN UNIV OF ELECTRONIC TECH
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